CN104316113A - Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays - Google Patents
Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays Download PDFInfo
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Abstract
The invention provides a gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays in the field of industrial gas-solid multiphase flow tests. The measurement device comprises the arc-shaped electrostatic electrode arrays, a first metal electrode set and a second metal electrode set are sequentially arranged in the inner circumferential face of each arc-shaped electrostatic electrode array side by side, first metal electrodes and second metal electrodes are each in the shape of an arc, and the axial width of each first metal electrode is smaller than that of each second metal electrode. The invention further relates to the measurement method based on the measurement device. According to the method, the speed and the flowing stability of solid phase powder are measured through the high sensitivity of the first metal electrodes and the bandwidth, and the solid phase power mass flow rate is measured through the large sensitive areas of the second metal electrodes and the space filtering effect. The device and method have the advantages that on-site implementation is convenient, measurement is accurate and reliable, the measurable range is large, the using time is long, and maintenance is convenient, and the device and method can be widely applied to continuous online monitoring of industrial pneumatic solid phase powder conveying.
Description
Art
the invention belongs to Dual-Phrase Distribution of Gas olid measuring technology scope, particularly a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.
Background technology
gas-solid multiphase flow is extensively present in Pneumatic conveying pipeline, admittedly expects in the middle of the essential industry such as fluidized bed and exhaust emissions production run.Solid phase powder flowing gas drive under motion conditions for optimized production process, enhance productivity and ensure that safety in production has great importance.Based on stress and throttle style traditional single phase fluid measurement method and be not suitable for the measurement of industrial gas-particle two-phase or polyphasic flow.Electric capacity, optics, radioactive ray, heat transfer, digital imagery and acoustic technique are easily subject to the impact of solid phase powder property and environmental baseline, are thus difficult to long-term use reliably in the commercial production that operating mode is changeable.
electrostatic Measurement technology is strong with its adaptability for working condition, passive measurement (noenergy injection fluid), install the advantage such as easy, easy to maintenance, structure is simple and cheap and have wide prospects for commercial application.Use the electrostatic measurement mechanism of intrusive mood electrode generating electrodes to wear and tear, disturb the problem such as solid phase powder flowing and production safety, be not suitable for commercial Application.Arc and ring electrode all can not fluid flow have an impact, and avoid the problems such as the wearing and tearing of Long-Time Service, can meet industrial requirement.Relative to ring electrode, structure is more simply compact, easy for installation, the advantage of very little maintenance, the cheap and high aspect of area sensitive degree to adopt the electrostatic measuring sonde of arc-shaped electrode to have.
in order to overcome the deficiency that existing Geldart-D particle solid phase powder measurement device exists, the present invention proposes a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.Consider the time variation of the complicacy that solid phase powder moves and commercial production operating mode, adopt multiple electrode composition arc electrostatic attraction electrode array can obtain many groups measurement result of local solid powder, several arc electrostatic attraction electrode arrays are installed in same pipeline section cross section and more can realize multimetering, improve reliability and the accuracy of whole measurement device.The advantages such as the present invention has that accuracy of measurement is high, reliable operation, measurement range are wide, structure is simple, easy for installation and maintenance is few, be widely used in the daily monitoring of industrial air solid phase powder mixture flow parameter, and provide reliable scientific basis for on-line tuning manufacturing parameter and optimized production process.
Summary of the invention
provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
the object of the present invention is to provide a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.
first aspect, the present invention relates to a kind of gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array, comprising:
arc electrostatic attraction electrode array (1), for the kinetic electrostatic fluctuation signal of also measure local charged solid phase powder; Described arc electrostatic attraction electrode array (1) inner peripheral surface is arranged side by side in turn the second metal electrode (3) described in the first metal electrode (2) described in a group and a group, wherein said first metal electrode (2) at least 3, described second metal electrode (3) at least 1; Described first metal electrode (2) and described second metal electrode (3) are arcuation, and institute is 1 °-180 ° to center of circle subtended angle; The axial width of described first metal electrode (2) is 1-10mm, and the axial width of described second metal electrode (3) is 5-100mm, and the axial width of described first metal electrode (2) is less than the axial width of described second metal electrode (3); The radial thickness of described first metal electrode (2) and described second metal electrode (3) is 1-10mm, and described radial direction is perpendicular to fluid direction of motion, and described axis is for being parallel to fluid direction of motion; Distance between described first metal electrode (2) is 10-50mm, and the distance between described second metal electrode (3) is 20-100mm, and described second metal electrode (3) is 20-200mm with the distance of adjacent described first metal electrode (2); Electrostatic signal is by drawing with the metal connection post (10) that described first metal electrode (2) and described second metal electrode (3) are directly connected; Described first metal electrode (2) and carry out electrical isolation by insulating material (11) between described second metal electrode (3) and described arc electrostatic attraction electrode array (1) base metal material, electrical isolation is carried out by described insulating material (11) between described metal connection post (10) and described arc electrostatic attraction electrode array (1) base metal material, and by metallic shield cover plate (9) shielding outside electromagnetic interference; Described arc electrostatic attraction electrode array (1) and embedded digital signal processing unit interconnect; Described arc electrostatic attraction electrode array (1) quantity being installed on the same pipeline section cross section of described Pneumatic conveying pipeline (4) is 1-18, each described arc electrostatic attraction electrode array (1) is fixed on the metal base (8) of described Pneumatic conveying pipeline (4) by flange, and embedding described Pneumatic conveying pipeline (4) outer wall, its inside surface is concordant with described Pneumatic conveying pipeline (4) inside surface;
embedded real-time signal processing unit (5), nurses one's health the electrostatic signal that described arc electrostatic attraction electrode array (1) measurement obtains and processes, described Embedded real-time signal processing unit (5) is connected by shielded cable with described arc electrostatic attraction electrode array (1), the electrostatic signal of input is carried out current/voltage-converted, amplify and be converted to digital signal after filtering process, and utilize the time domain of the first metal electrode (2) measuring-signal and frequency domain character to carry out analysis to carry out identification solid phase powder flow pattern, utilize hyperchannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain flowing velocity and the flow stability parameter of solid phase powder, and then calculate solid phase powder quality flow parameter in conjunction with the time domain such as mean value and root mean square of described second metal electrode (3) measuring-signal or frequency domain character,
centralized control unit (6), data for obtaining arc electrostatic attraction electrode array (1) described at least one on same pipeline section cross section are weighted the average solid phase powder that obtains in the mean motion parameter of whole pipeline section, carry out real-time display and the record of data simultaneously; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), and then can realize real time monitoring or the regulable control of solid phase powder flowing situation.
second aspect, the invention still further relates to a kind of gas-solid multiphase flow On-line Measuring Method based on arc electrostatic attraction electrode array (1), mainly comprises the steps:
step 1, arc electrostatic attraction electrode array (1) obtain the electrostatic fluctuation signal that local solid powder flowing causes;
step 2, Embedded real-time signal processing unit (5) receive the electrostatic signal that described arc electrostatic attraction electrode array (1) obtains, and signal is nursed one's health and is converted into the digital signal meeting embedded digital processor processing requirements, then pass through multiple flowing velocities of cross-correlation Computational Method of Velocity Measurement calculating solid phase powder, fluid stable degree and solid phase powder quality flow information; Described signal condition for carry out analog/digital signal conversion by electrostatic signal after current/voltage-converted, amplification and filtering link;
the local solid powder flowing information that primary Calculation obtains by step 3, Embedded real-time signal processing unit (5) carries out screening and weighted mean, and carry out confidence judgement according to the historical measurement data of described solid phase flowing velocity and mass rate, elimination system and measuring error, then the fusion results being obtained the flowing velocity of local solid powder, mass rate and flowing degree of stability by the running mean process of data;
step 4, the data that Embedded real-time signal processing unit (5) exports are received by described centralized control unit (6), described centralized control unit (6) is weighted the average solid phase powder that obtains in the mean motion parameter of whole pipeline section to the data that arc electrostatic attraction electrode array (1) described at least one on same pipeline section cross section obtains, and carries out real-time display and the record of data simultaneously; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), and then can realize real time monitoring or the regulable control of solid phase powder flowing situation.
the present invention has following beneficial effect:
device of the present invention can to the flowing velocity of solid phase powder in Pneumatic conveying pipeline in commercial production (4), and mass rate and flow stability carry out Real-Time Monitoring;
the present invention is by arc electrostatic attraction electrode array (1), the realizations such as Embedded real-time signal processing unit (5) and centralized control unit (6), the wherein kinetic electrostatic fluctuation signal of arc electrostatic attraction electrode array (1) also measure local charged solid phase powder, Embedded real-time signal processing unit (5) is nursed one's health electrostatic signal and is processed, and the flowing velocity obtaining solid phase powder is merged by Multi-parameter data, mass rate and fluid stable degree, the data that centralized control unit (6) is exported by fieldbus reception Embedded real-time signal processing unit (5), aftertreatment is carried out to it, comprehensive analysis, display, the running parameter of record and configuration Embedded real-time signal processing unit (5) in real time, and send Monitoring Data in real time to industrial site surveillance,
the present invention designs for non-intrusion type, do not disturb solid phase powder flowing situation, and volume is little, lightweight, and be convenient to industry spot and install, maintenance workload is few;
the present invention adopts multiple arc electrostatic attraction electrode array (1) can realize the measurement of comparison of solid phase powder flowing parameter in multiple dispersion Pneumatic conveying pipeline (4), be particularly useful for needing the production run of quantitatively allocating solid phase powder flow parameter in multiple Pneumatic conveying pipeline (4), have that construction is simple, small investment, the advantage such as safe and reliable.
Accompanying drawing explanation
below with reference to the accompanying drawings illustrate embodiments of the invention, above and other objects, features and advantages of the present invention can be understood more easily.Parts in accompanying drawing are just in order to illustrate principle of the present invention.In the accompanying drawings, same or similar technical characteristic or parts will adopt same or similar Reference numeral to represent.
fig. 1 is the structural representation of the gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array (1) that the embodiment of the present invention provides.
fig. 2 is the axial cross-sectional views being arranged on the arc electrostatic attraction electrode array (1) on round section Pneumatic conveying pipeline (4) that the embodiment of the present invention provides.
fig. 3 is the radial section diagrammatic cross-section of the electrostatic attraction electrode of arc shown in Fig. 2 array (1).
description of reference numerals: arc electrostatic attraction electrode array (1), the first metal electrode (2), the second metal electrode (3), Pneumatic conveying pipeline (4), Embedded real-time signal processing unit (5), centralized control unit (6), Field Monitoring System (7), metal base (8), metallic shield cover plate (9), metal connection post (10), insulating material (11), signal leading-out terminal (12).
Embodiment
with reference to the accompanying drawings embodiments of the invention are described.The element described in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with the element shown in one or more other accompanying drawing or embodiment and feature.It should be noted that for purposes of clarity, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.
embodiment 1
the present embodiment provides a kind of gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array (1).Fig. 1 is the structural representation of the gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array (1) that the embodiment of the present invention provides.As shown in Figure 1:
the gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array (1) that the present embodiment provides, comprises arc electrostatic attraction electrode array (1), Embedded real-time signal processing unit (5) and centralized control unit (6) etc.Described arc electrostatic attraction electrode array (1) inner peripheral surface is arranged side by side in turn the second metal electrode (3) described in the first metal electrode (2) described in a group and a group.Described first metal electrode (2) and described second metal electrode (3) are arcuation, and institute is 1 °-180 ° to center of circle subtended angle.The axial width of described first metal electrode (2) is less than the axial width of described second metal electrode (3).Described second metal electrode (3) is for the flow measurement of solid phase powder quality, and described first metal electrode (2) is measured for solid phase powder flow rate, and plays the effect of subsidiary mass rate.The axial sensitizing range of described first metal electrode (2) is narrow, and be beneficial to and accurately measure solid phase powder flowing speed, the axial sensitizing range of described second metal electrode (3) is large, is beneficial to Measurement accuracy solid phase powder concentration.
as preferably, described arc electrostatic attraction electrode array (1) inner peripheral surface is arranged side by side in turn at least 3 described first metal electrodes (2), to obtain multiple signals for multi-data fusion.
as preferably, described first metal electrode (2) axial width is 1-10mm, to ensure the susceptibility of solid phase powder signal measurement, avoids Spatial Filtering Effect; The axial width of described second metal electrode (3) is 5-100mm, to ensure enough sensitizing range scopes and spatial filtering effect; The radial thickness of described first metal electrode (2) and described second metal electrode (3) is 1-10mm, to ensure withstand strength and the hypersensitivity of electrode; Described radial direction is perpendicular to fluid direction of motion, and described axis is for being parallel to fluid direction of motion.
as preferably, the distance between described first metal electrode (2) is 10-50mm, to adapt to the Measurement accuracy of different in flow rate solid phase powder; Distance between described second metal electrode (3) is 20-100mm, to eliminate the overlap of sensitivity field; Described first metal electrode (2) is 20-200mm with the distance of adjacent second metal electrode (3), to avoid the mutual inductance effect between described first metal electrode (2) and described second metal electrode (3) sensitivity field.
as preferably, described arc electrostatic attraction electrode array (1) quantity being installed on the same pipeline section cross section of described Pneumatic conveying pipeline (4) is 1-12; Each described arc electrostatic attraction electrode array (1) is fixed on the described metal base (8) of described Pneumatic conveying pipeline (4) by flange, and embedding described Pneumatic conveying pipeline (4) outer wall, its inside surface is concordant with described Pneumatic conveying pipeline (4) inside surface.
fig. 2 is the axial cross-sectional views being arranged on the arc electrostatic attraction electrode array (1) on round section Pneumatic conveying pipeline (4) that the embodiment of the present invention provides, and Fig. 3 is the radial section diagrammatic cross-section that the electrostatic attraction electrode of arc shown in Fig. 2 array (1) is installed.From Fig. 2 and Fig. 3,
as preferably, on described Pneumatic conveying pipeline (4), size cuts out installing port as requested, and described metal base (8) is welded in incision; Described arc electrostatic attraction electrode array (1) loads described metal base (8), ensure its inside surface with the internal diameter of described Pneumatic conveying pipeline (4) consistent; Described arc electrostatic attraction electrode array (1) is made up of described second metal electrode (3) of the axial widths of 3 equidistant arrangements to be described first metal electrode (2) of 4mm and 1 axial width be 20mm, its radial thickness is 4mm, and institute is 15 ° to central angle; Described first metal electrode (2) is 30mm with the distance of adjacent described second metal electrode (3);
as preferably, electrostatic signal is by drawing with the described metal connection post (10) that described first metal electrode (2) and described second metal electrode (3) are directly connected.3 described first metal electrodes (2) and carry out electrical isolation by described insulating material (11) between 1 described second metal electrode (3) and described arc electrostatic attraction electrode array (1) base metal material; Electrical isolation is carried out by described insulating material (11) between described metal connection post (10) and described arc electrostatic attraction electrode array (1) base metal material, and by described metallic shield cover plate (9) shielding outside electromagnetic interference; Described arc electrostatic attraction electrode array (1) and described Embedded real-time signal processing unit (5) interconnect;
as preferably, Embedded real-time signal processing unit (5) is connected by shielded cable with described arc electrostatic attraction electrode array (1), by the electrostatic signal of input through resistance/capacitance network switch be voltage signal, amplify and be converted to digital signal again after filtering process, and utilize the time domain of described first metal electrode (2) measuring-signal and frequency domain character to carry out analysis to carry out identification solid phase powder flow pattern, utilize hyperchannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain flowing velocity and the flow stability parameter of solid phase powder, and then calculate solid phase powder quality flow parameter in conjunction with the time domain such as mean value and root mean square of described second metal electrode (3) measuring-signal or frequency domain character,
as preferably, centralized control unit (6) carries out the method such as confidence distribution judgement, weighted mean and Kalman filtering and optimizes the flowing velocity of solid phase powder, mass rate and solid phase powder flowing degree of stability based on historical measurement data, carry out real-time display and the record of data simultaneously; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), and then can realize real time monitoring or the regulable control of solid phase powder flowing situation.
embodiment 2
the present embodiment provides a kind of gas-solid multiphase flow On-line Measuring Method based on arc electrostatic attraction electrode array, mainly comprises the steps:
step 1, arc electrostatic attraction electrode array (1) obtain the electrostatic fluctuation signal that local solid powder flowing causes;
step 2, Embedded real-time signal processing unit (5) are connected by shielded cable with described arc electrostatic attraction electrode array (1), are voltage signal by the electrostatic signal of input, are converted to digital signal again after amplification and filtering process through resistance/capacitance network switch;
step 3, Embedded real-time signal processing unit (5) utilize the time domain of described first metal electrode (2) measuring-signal and frequency domain character to carry out analysis to carry out identification solid phase powder flow pattern, utilize hyperchannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain flowing velocity and the flow stability parameter of solid phase powder, and then calculate solid phase powder quality flow parameter in conjunction with the time domains such as the mean value of described second metal electrode (3) measuring-signal and root mean square or frequency domain character;
step 4, centralized control unit (6) carries out the method such as confidence distribution judgement, weighted mean and Kalman filtering and optimizes real-time display and the record that the flowing velocity of solid phase powder, mass rate and solid phase powder flowing degree of stability carry out data simultaneously based on historical measurement data; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), and then can realize real time monitoring or the regulable control of solid phase powder flowing situation.
use standard CAN bus communications protocol, described centralized control unit (6) can be made to receive the measurement data of maximum 255 described arc electrostatic attraction electrode arrays (1), and realize comprehensively analyzing all measurement results, showing in real time and data record simultaneously; The running parameter of the described Embedded real-time signal processing unit (5) that real-time configuration is connected with arc electrostatic attraction electrode array (1) described in each; And by data transfer to described Field Monitoring System (7); Communication can be realized by the various ways such as hardwire, Ethernet, OPC, Modbus, CAN, TCP/RTU or RS485 between described centralized control unit (6) and Field Monitoring System (7).
device of the present invention can the speed of solid phase powder in Pneumatic conveying pipeline (4), mass rate and flowing degree of stability information in Real-Time Monitoring commercial production.The present invention is by arc electrostatic attraction electrode array (1), the realizations such as Embedded real-time signal processing unit (5) and centralized control unit (6), wherein arc electrostatic attraction electrode array (1) is made up of the arc electrostatic attraction electrode array of two groups of axially different width, for measuring the fluctuation information of charged solid phase powder, described Embedded real-time signal processing unit (5) is nursed one's health measuring-signal and carries out multiple signals related operation and multi-data fusion, thus draw the flow parameter of solid phase powder, measurement result is sent to described centralized control unit (6) by fieldbus and shows, record, and realize the communication with described Field Monitoring System (7).Method of the present invention can carry out Real-Time Monitoring when not disturbing solid phase powder flowing to its dominant motion parameters, accuracy is high, reliable operation, measurement range are wide, structure is simple, easy for installation and maintenance is few, be widely used in the daily monitoring of industrial air/solid phase powder mixture flow parameter, and provide reliable scientific basis for on-line tuning manufacturing parameter and optimized production process.The present invention adopts multiple described arc electrostatic attraction electrode array (1) can realize the measurement of comparison of solid phase powder flowing parameter in multiple dispersion Pneumatic conveying pipeline (4), be particularly useful for needing the production run of quantitatively allocating solid phase powder flow parameter in multiple Pneumatic conveying pipeline (4), have that construction is simple, small investment, the advantage such as safe and reliable.
last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1., based on a gas-solid multiphase flow on-line measurement device for arc electrostatic attraction electrode array, comprise arc electrostatic attraction electrode array (1), Embedded real-time signal processing unit (5) and centralized control unit (6); The kinetic electrostatic fluctuation signal of described arc electrostatic attraction electrode array (1) also measure local charged solid phase powder; Described Embedded real-time signal processing unit (5) is connected by shielded cable with described arc electrostatic attraction electrode array (1), for conditioning and the process of electrostatic signal, and merged the flowing velocity, mass rate and the fluid stable degree that obtain local solid powder by Multi-parameter data; Described centralized control unit (6) receives by fieldbus the data that described Embedded real-time signal processing unit (5) exports, aftertreatment, comprehensive analysis, display and record are carried out to data, and described Embedded real-time signal processing unit (5) is configured in real time simultaneously; Described production scene supervisory system (7) receives the solid phase powder flowing parameter that described centralized control unit (6) sends.
2. arc electrostatic attraction electrode array (1) according to claim 1, it is characterized in that, described arc electrostatic attraction electrode array (1) inner peripheral surface is arranged side by side in turn the second metal electrode (3) described in the first metal electrode (2) described in a group and a group, wherein said first metal electrode (2) at least 3, described second metal electrode (3) at least 1.
3. the arc electrostatic attraction electrode array (1) according to any one of claim 1-2, is characterized in that, described first metal electrode (2) and the second metal electrode (3) are arcuation, and institute is 1 °-180 ° to center of circle subtended angle.
4. the arc electrostatic attraction electrode array (1) according to any one of claim 1-2, is characterized in that, the axial width of described first metal electrode (2) is less than the axial width of described second metal electrode (3); First metal electrode (2) axial width is 1-10mm; The axial width of described second metal electrode (3) is 5-100mm; The radial thickness of described first metal electrode (2) and described second metal electrode (3) is 1-10mm.
5. the arc electrostatic attraction electrode array (1) according to any one of claim 1-2, it is characterized in that, distance between described first metal electrode (2) is 10-50mm, distance between described second metal electrode (3) is 20-200mm, and described first metal electrode (2) is 20-200mm with the distance of described adjacent second metal electrode (3).
6. the arc electrostatic attraction electrode array (1) according to any one of claim 1-5, it is characterized in that, between the metal master of described first metal electrode (2) and described second metal electrode (3) and described arc electrostatic attraction electrode array (1), realize electrical isolation protection by insulating material (11); The metal master of described arc electrostatic attraction electrode array (1) and described metallic shield cover plate (9) ground connection form the shielding space to described first metal electrode (2) and described second metal electrode (3).
7. the one according to any one of claim 1-6 is based on the gas-solid multiphase flow on-line measurement device of arc electrostatic attraction electrode array (1), it is characterized in that, described arc electrostatic attraction electrode array (1) quantity being installed on the same pipeline section cross section of described Pneumatic conveying pipeline (4) is 1-18; Each described arc electrostatic attraction electrode array (1) is fixed on the described metal base (8) of described Pneumatic conveying pipeline (4) by flange, and embedding described Pneumatic conveying pipeline (4) outer wall, its inside surface is concordant with described Pneumatic conveying pipeline (4) inside surface.
8. Embedded real-time signal processing unit (5) according to claim 1, is converted to digital signal after electrostatic signal being carried out current/voltage-converted, amplification and filtering process; Utilize the time domain of described first metal electrode (2) measuring-signal and frequency domain character to carry out analysis and carry out identification solid phase powder flow pattern, and utilize hyperchannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient to carry out data fusion, obtain flowing velocity and the flow stability parameter of solid phase powder; Meanwhile, solid phase powder quality flow parameter is calculated in conjunction with the time domain such as mean value and root mean square of described second metal electrode (3) measuring-signal or frequency domain character.
9. centralized control unit (6) according to claim 1, the average solid phase powder that obtains is weighted in the mean motion parameter of whole pipeline section to the data that the described arc electrostatic attraction electrode array (1) on same pipeline section cross section obtains, carries out real-time display and the record of data simultaneously; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), is conducive to the real time monitoring or the regulable control that realize solid phase powder flowing situation.
10., based on a gas-solid multiphase flow On-line Measuring Method for arc electrostatic attraction electrode array (1), it is characterized in that, mainly comprise the steps:
Step 1, arc electrostatic attraction electrode array (1) described in multiple any one of claim 1-7 obtain the electrostatic fluctuation signal that local solid powder flowing causes;
Step 2, Embedded real-time signal processing unit (5) receive the electrostatic signal that described arc electrostatic attraction electrode array (1) obtains, and signal is nursed one's health and is converted into the digital signal meeting embedded dsp processing requirements, then multiple flowing velocities, the fluid stable degree of solid phase powder is calculated by cross-correlation Computational Method of Velocity Measurement, and solid phase powder quality flow information; Described signal condition for carry out analog/digital signal conversion by electrostatic signal after current/voltage-converted, amplification and filtering link;
The local solid powder flowing feature that primary Calculation obtains by step 3, Embedded real-time signal processing unit (5) carries out meteor trail echoes, data screening and weighted mean, and carry out confidence judgement according to described solid phase powder historical measurement data, elimination system and measuring error, then the fusion results being obtained the flowing velocity of local solid powder, mass rate and flowing degree of stability by the running mean process of data;
Step 4, the data that described Embedded real-time signal processing unit (5) exports are received by described centralized control unit (6), described centralized control unit (6) is weighted the average solid phase powder that obtains in the mean motion parameter of whole pipeline section to the data that at least one the arc electrostatic attraction electrode array (1) on same pipeline section cross section obtains, and carries out real-time display and the record of data simultaneously; And according to monitoring result and working conditions change, the running parameter to described Embedded real-time signal processing unit (5) carries out real-time regulating allocation; The measurement data that described centralized control unit (6) exports is received by Field Monitoring System (7), auxiliary real time monitoring or the regulable control realizing solid phase powder flowing situation.
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| CN111781114A (en) * | 2020-07-09 | 2020-10-16 | 南京大得科技有限公司 | Device and method for detecting concentration and speed of gas-solid two-phase flow |
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